Toyota Tundra (2015 year). Manual — part 2356
Last Modified: 9-16-2014
6.6 U
Doc ID: RM000001TCR031X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: SYSTEM DIAGRAM; 2015 MY Tundra [08/2014 -
]
SYSTEM DIAGRAM
ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: SYSTEM...
Last Modified: 9-16-2014
6.6 D
Doc ID: RM000001TCO02ZX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: SYSTEM DESCRIPTION; 2015 MY Tundra [08/2014
- ]
SYSTEM DESCRIPTION
1. ENGINE IMMOBILISER SYSTEM DESCRIPTION
The engine immobiliser system is designed to prevent the vehicle from being stolen. This system uses the
effectively disabling the engine.
2. FUNCTION OF MAIN COMPONENT
COMPONENT
OUTLINE
Transponder key
amplifier
When key is inserted into ignition key cylinder, antenna coil receives key code. Then
amplifier amplifies ID code and outputs it to transponder key ECU.
Unlock warning switch
Detects whether key is in ignition key cylinder and outputs results to transponder key
ECU.
Security indicator light
Front door courtesy
light switch LH
Located on front door LH. Detects door status (open or closed) and outputs data to
main body ECU. Turns on when door is open and turns off when door is closed.
3. SYSTEM FUNCTION
(a) When the transponder key ECU detects that the unlock warning switch is ON, the transponder key ECU
provides current to the antenna coil and produces a weak electric wave. A transponder chip in the key grip
receives the electric wave. Upon receiving the electric wave, the transponder chip outputs a key ID code
signal. The transponder key coil receives this signal, the signal is amplified by the transponder key
amplifier, and the signal is transmitted to the transponder key ECU.
(b) The transponder key ECU matches the key's ID code with the vehicle's ID code, which was previously
registered in the transponder key ECU, and communicates the results to the ECM. After the identification
results show that the key's ID code matches the vehicle's ID code and the transponder key ECU has
confirmed their match: 1) the engine immobiliser system is canceled and the engine starting controls (fuel
injection control and ignition control) enter standby mode; and 2) the transponder key ECU transmits a
security indicator light signal that communicates "indicator OFF" to the Combination meter Assembly
(security indicator light), and the security indicator light turns off.
(c) The security indicator light pattern is as shown below (when changing from the immobiliser set status to the
unset status).
ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: SYSTE...
ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: SYSTE...
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Last Modified: 9-16-2014
6.6 D
Doc ID: RM000001TC903YX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING;
2015 MY Tundra [08/2014 - ]
HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
Use these procedures to troubleshoot the engine immobiliser system.
*: Use the Techstream.
1.
VEHICLE BROUGHT TO WORKSHOP
2.
INSPECT BATTERY VOLTAGE
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery before proceeding.
3.
CRANK ENGINE FOR MORE THAN 10 SECONDS
4.
CHECK FOR DTC*
(a) Check for DTCs and note any codes that are output
.
(b) Clear the DTCs
.
(c) Recheck for DTCs. Try to duplicate the DTC (SFI system and engine immobiliser system) by
simulating the symptoms indicated by the DTC.
Result
ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: HOW T...
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